/Engine/Source/Runtime/StaticMeshDescription/Public/StaticMeshOperations.h
static void AppendMeshDescription ( const [FMeshDescription](API\Runtime\MeshDescription\FMeshDescription) & SourceMesh, [FMeshDescription](API\Runtime\MeshDescription\FMeshDescription) & TargetMesh, [FAppendSettings](API\Runtime\StaticMeshDescription\FStaticMeshOperations\FAppendSettings) & AppendSettings )